28587664 has 20 divisors (see below), whose sum is σ = 63301504. Its totient is φ = 12251808.

The previous prime is 28587641. The next prime is 28587667. The reversal of 28587664 is 46678582.

It is not an unprimeable number, because it can be changed into a prime (28587667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127512 + ... + 127735.

Almost surely, 2^28587664 is an apocalyptic number.

It is an amenable number.

28587664 is an abundant number, since it is smaller than the sum of its proper divisors (34713840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28587664 is a wasteful number, since it uses less digits than its factorization.

28587664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255262 (or 255256 counting only the distinct ones).

The product of its digits is 645120, while the sum is 46.

The square root of 28587664 is about 5346.7433078464. The cubic root of 28587664 is about 305.7686034526.

The spelling of 28587664 in words is "twenty-eight million, five hundred eighty-seven thousand, six hundred sixty-four".